Unix – Release Memory

This is a very useful command to release the memory without rebooting your system.

You can checked the memory usage first:

$ free
             total       used       free     shared    buffers     cached
Mem:       4055232    3218700     836532          0     449472    1270920
-/+ buffers/cache:    1498308    2556924
Swap:            0          0          0

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